Finding the Third Proportional to 1,391,136 and 2,931,708

Step by Step Solution

1. Step 1: Write the proportion equation
   1,391,136 : 2,931,708 = 2,931,708 : x
2. Step 2: Convert to fraction form
   1,391,136/2,931,708 = 2,931,708/x
3. Step 3: Cross multiply
   1,391,136x = 2,931,708 × 2,931,708
4. Step 4: Simplify right side
   1,391,136x = 8,594,911,797,264
5. Step 5: Solve for x
   x = 8,594,911,797,264/1,391,136
6. Step 6: Final answer
   x = 6,178,340.43